Portable electronic apparatus

ABSTRACT

A portable electronic apparatus includes a case, a solar cell disposed in the case, a GPS antenna as an antenna section disposed in the case, including a base as a nonconductive member and a conductive body disposed on a surface of the nonconductive member, and adapted to receive a positioning satellite signal, and a circuit board disposed in the case, and electrically connected to the solar cell and the antenna section, and the antenna section overlaps the solar cell in a planar view viewed from a normal direction of light receiving surfaces of the solar cell.

CROSS-REFERENCES TO RELATED APPLICATIONS

This application is a Continuation of U.S. patent application Ser. No.16/912,111 filed Jun. 25, 2020, which is a Continuation of U.S. patentapplication Ser. No. 16/043,888, filed Jul. 24, 2018 (now U.S. Pat. No.10,734,715 issued on Aug. 4, 2020), which claims priority to JapanesePatent Application No. 2017-152973, filed Aug. 8, 2017, the disclosureof the prior applications is hereby incorporated by reference herein intheir entirety.

BACKGROUND 1. Technical Field

The present invention relates to a portable electronic apparatus.

2. Related Art

In the past, there has been known a portable electronic apparatus suchas a wrist device mounted on a region such as a wrist with a band or thelike, and provided with a clock display function and a position displayfunction. In, for example, JP-A-2016-176957 (Document 1), a so-calledanalog wristwatch which is mounted on the body of the wearer and isprovided with a patch antenna for receiving a GPS (Global PositioningSystem) radio wave from a GPS satellite (a positioning satellite) as anexample of the positioning system, a solar panel for performingself-power generation, and so on is disclosed as an example of theportable electronic apparatus.

However, the patch antenna used in the analog wristwatch disclosed inDocument 1 is made capable of receiving the GPS radio wave by using adielectric substance high in relative permittivity, and therefore growsin size. With respect to the analog wristwatch disclosed in Document 1,in the case in which such a patch antenna is used in a so-called digitaldisplay-type portable electronic apparatus performing digital displayusing a display panel, there is a problem that the portable electronicapparatus grows in size since the patch antenna is too large in size inthe case of installing the display panel, the GPS function, the solarpanel, or a variety of sensors.

SUMMARY

An advantage of some aspects of the invention is to solve at least apart of the problems described above, and the invention can beimplemented as the following forms or application examples.

APPLICATION EXAMPLE 1

A portable electronic apparatus according to this application exampleincludes a case, a solar cell disposed in the case, an antenna sectiondisposed in the case, including a nonconductive member and a conductivebody disposed on a surface of the nonconductive member, and adapted toreceive a positioning satellite signal, and a circuit board disposed inthe case, and electrically connected to the solar cell and the antennasection, wherein the antenna section overlaps the solar cell in a planarview viewed from a normal direction of a light receiving surface of thesolar cell.

According to the portable electronic apparatus according to thisapplication example, since the antenna section can compactly beconstituted by the nonconductive member and the conductive body disposedon the surface of the nonconductive member, the antenna can be madesmall in size. Further, since the nonconductive member constituting theantenna section for receiving the radio signal related to the signal tobe obtained by the processing section supported by the circuit board, inother words, at least a part of the antenna, is disposed so as tooverlap the solar cell in the planar view of the light receiving surfaceof the solar cell, it becomes possible to house the antenna in the caseeven in the small-sized portable electronic apparatus.

APPLICATION EXAMPLE 2

In the portable electronic apparatus according to the applicationexample described above, it is preferable that there are furtherincluded a processing section supported by the circuit board, and aconnection section adapted to electrically connect the antenna sectionand the processing section to each other, and supported by the circuitboard, and the connection section overlaps the solar cell in the planarview.

According to this application example, since the connection section forelectrically connecting the antenna section and the processing sectionto each other is disposed so as to overlap the solar cell in the planarview of the light receiving surface of the solar cell, it is possible toincrease the degree of freedom of the arrangement layout of the antennasection and the processing section, and at the same time, the compactarrangement can be achieved. Further, it is possible to increase thelight receiving area of the solar cell without affecting the receivingsensitivity of the antenna, and thus, it is possible to increase theproduction of electricity in the solar cell.

APPLICATION EXAMPLE 3

In the portable electronic apparatus according to the applicationexample described above, it is preferable that the case has an openingsection opening on one side in the normal direction, the solar cell isprovided with an outer edge part shorter than an inner circumferentiallength of the opening section, and an inner edge part shorter in lengththan the outer edge part in the planar view, and at least a part of theconnection section is disposed between the outer edge part and the inneredge part.

According to this application example, since at least either one of thenonconductive member constituting the antenna section and the connectionsection is disposed between the outer edge part along the innercircumference of the opening of the case and the inner edge part shorterin length than the outer edge part, it is possible to increase thedegree of freedom of the arrangement layout of the antenna section andthe processing section, and at the same time, it is possible to improvethe receiving sensitivity of the antenna section due to the capacitivecoupling between the antenna section and the solar cell.

APPLICATION EXAMPLE 4

In the portable electronic apparatus according to the applicationexample described above, it is preferable that the antenna section isdisposed between the solar cell and the circuit board in across-sectional view viewed from a direction perpendicular to a normaldirection of the light receiving surface.

According to this application example, it is possible to use thewavelength shortening effect by using the circuit board as thedielectric body in addition to the nonconductive member, and thus, it ispossible to make the antenna section more compact (smaller in size).Further, due to the capacitive coupling between the antenna section andthe circuit board, it is possible to improve the receiving sensitivityof the antenna section.

APPLICATION EXAMPLE 5

In the portable electronic apparatus according to the applicationexample described above, it is preferable that at least a part of thenonconductive member overlaps the solar cell in the planar view.

According to this application example, since at least a part of thenonconductive member overlaps the solar cell in the planar view, due tothe capacitive coupling between the nonconductive member and the solarcell, the receiving sensitivity of the antenna section can be improved.

APPLICATION EXAMPLE 6

In the portable electronic apparatus according to the applicationexample described above, it is preferable that the connection section isa contact point adapted to electrically connect the conductive body andthe processing section to each other.

According to this application example, due to the connection section(the contact point) supported by the circuit board, the electricalconnection between the processing section and the antenna section as aseparated member can compactly be achieved on the circuit board.

APPLICATION EXAMPLE 7

In the portable electronic apparatus according to the applicationexample described above, it is preferable that there is further includeda display section electrically connected to the processing section, andan outer circumferential end part of the display section is disposedbetween the outer edge part and the inner edge part of the solar cell inthe planar view.

According to this application example, since the outer circumferentialend part of the display section is disposed between the outer edge partand the inner edge part of the solar cell in the planar view, in otherwords, the outer circumferential end part of the display sectionoverlaps the solar cell, it is possible to improve the arrangementbalance between the solar cell and the display section. Thus, a largerarea of the solar cell can be ensured while ensuring the area of thedisplay section.

APPLICATION EXAMPLE 8

In the portable electronic apparatus according to the applicationexample described above, it is preferable that the antenna section isdisposed on an outer side of a contour of the display section in theplanar view.

According to this application example, since the antenna section isdisposed on the outer circumference side of the case, it is possible toincrease the degree of freedom of the arrangement layout of the displaysection, the solar cell, and so on, and thus, it is possible to moreeffectively arrange the display section, the solar cell, and so on.

BRIEF DESCRIPTION OF THE DRAWINGS

The invention will be described with reference to the accompanyingdrawings, wherein like numbers reference like elements.

FIG. 1 is a schematic configuration diagram showing a brief overview ofan exercise assistance system to which a wrist device as a portableelectronic apparatus is applied.

FIG. 2 is an external perspective view viewed from the obverse side (adisplay surface side) showing a schematic configuration of the wristdevice according to a first embodiment of the invention.

FIG. 3 is an external perspective view viewed from the reverse sideshowing the schematic configuration of the wrist device according to thefirst embodiment.

FIG. 4 is a cross-sectional view showing a configuration of the wristdevice according to the first embodiment.

FIG. 5 is a plan view showing the configuration of the wrist deviceaccording to the first embodiment.

FIG. 6 is a functional block diagram showing a schematic configurationof the wrist device according to the first embodiment.

FIG. 7 is a partial cross-sectional view showing Arrangement Example 1of the constituents of the wrist device according to the firstembodiment.

FIG. 8 is a partial cross-sectional view showing Arrangement Example 2of the constituents of the wrist device according to the firstembodiment.

FIG. 9 is a cross-sectional view showing a configuration of a wristdevice according to a second embodiment of the invention.

FIG. 10 is a plan view showing the configuration of the wrist deviceaccording to the second embodiment.

FIG. 11 is a plan view showing Modified Example 1 of an arrangement of asolar cell and a GPS antenna.

FIG. 12 is a plan view showing Modified Example 2 of the arrangement ofthe solar cell and the GPS antenna.

FIG. 13 is a plan view showing Modified Example 3 of the arrangement ofthe solar cell and the GPS antenna.

FIG. 14 is a plan view showing Modified Example 4 of the arrangement ofthe solar cell and the GPS antenna.

DESCRIPTION OF EXEMPLARY EMBODIMENTS

Some embodiments of a system according to the invention will hereinafterbe described. It should be noted that the embodiments described below donot unreasonably limit the contents of the invention as set forth in theappended claims. Further, all of the constituents described in each ofthe embodiments are not necessarily essential elements of the invention.

1. Method According to Present Embodiment

Firstly, an exercise assistance system as an example of a system towhich the portable electronic apparatus according to the invention isapplied will be described. The description will hereinafter be presentedillustrating a wrist device (a wearable device) provided with a pulsewave sensor and a body motion sensor, and mounted on, for example, awrist of the user as an example of the portable electronic apparatus.

The wrist device as the portable electronic apparatus used in theexercise assistance system is provided with a solar cell disposed on thedisplay section side, and is provided with the pulse wave sensor forobtaining pulse wave information as biological information of the user,and the body motion sensor for obtaining motion information of the user.Further, the wrist device is provided with a GPS (Global PositioningSystem) as an example of a positioning system using a locationinformation satellite called Global Navigation Satellite System (GNSS)or the like for obtaining the location information of the user. Itshould be noted that the portable electronic apparatus is not limited tothe wrist device, but can also be a wearable device to be mounted onother regions of the user such as a neck region or an ankle region.

The pulse wave sensor as an example of the biological informationmeasurement section is capable of obtaining the pulse wave informationsuch as a pulse rate. As the pulse wave sensor, there is used, forexample, a photoelectric sensor (a photosensor). In this case, it ispossible to adopt a method of detecting the reflected light or thetransmitted light of the light with which a living body is irradiated,using the photoelectric sensor. Since an amount of absorption and anamount of reflection of the light with which the living body isirradiated are different by the blood flow in the blood vessels, thesensor information detected by the photoelectric sensor becomes a signalcorresponding to the blood flow or the like, and by analyzing thesignal, it is possible to obtain the information related to thepulsation. It should be noted that the pulse wave sensor is not limitedto the photoelectric sensor, and it is possible to use other sensorssuch as an electrocardiograph or an ultrasonic sensor.

It should be noted that the photoelectric sensor (the photosensor) isrequired to receive necessary light and block unwanted light, and in theexample of the pulse wave sensor, it becomes necessary to receive thereflected light including the pulse wave component reflected by a testsample (in particular, a region including the blood vessels as themeasurement object) as the object of the measurement, and block otherlight since other light acts as a noise component.

The body motion sensor is a sensor for detecting the body motion of theuser. As the body motion sensor, it is conceivable to use anacceleration sensor, an angular velocity sensor, an orientation sensor(a geomagnetic sensor), a pressure sensor (an altitude sensor) or thelike, but other sensors can also be used.

The GPS is also called Global Positioning System, and is a satellitepositioning system for measuring the current location on the earth basedon a plurality of satellite signals. The GPS is provided with a functionof performing a positioning calculation using the GPS time informationand orbital information to obtain the location information of the user,and a time correction function in the clock function.

2. Exercise Assistance System

Then, a configuration of the exercise assistance system to which thewrist device as the portable electronic apparatus is applied will bedescribed with reference to FIG. 1 . FIG. 1 is a schematic configurationdiagram showing a brief overview of the exercise assistance system towhich the wrist device as the portable electronic apparatus is applied.

As shown in FIG. 1 , the exercise assistance system 100 according to thepresent embodiment includes the wrist device 200 as the portableelectronic apparatus which is a detection device provided with a pulsewave sensor as the biological sensor (the photoelectric sensor), anacceleration sensor as a body motion sensor, the GPS, and so on, aportable device 300 as an exercise assistance device, and a server 400as an information processing device connected to the portable device 300via a network NE.

The GPS as the Global Navigation Satellite System provided to the wristdevice 200 is provided with a function of receiving the radio waves(satellite signals) from GPS satellites 8 to correct the internal time,and perform the positioning calculation to obtain the locationinformation. The GPS satellites 8 are an example of the locationinformation satellites traveling on predetermined orbits above theearth, and each transmitting a high frequency radio wave superimposedwith a navigation message to the ground. In the following description,the radio wave on which the navigation message is superimposed isreferred to as a satellite signal.

The satellite signal from each of the GPS satellites 8 includes theextremely accurate GPS time information, and a time correction parameterfor correcting the time error. It is possible for the wrist device 200to receive the satellite signal (the radio wave) transmitted from one ofthe GPS satellites 8 to obtain the time information using the GPS timeinformation and the time correction parameter included in the satellitesignal.

Further, the satellite signal also includes the orbital informationrepresenting the position on the orbit of the GPS satellite 8. The wristdevice 200 is capable of performing the positioning calculation usingthe GPS time information and the orbital information. The positioningcalculation is performed on the assumption that the internal time of thewrist device 200 includes a certain amount of error. In other words, thetime error becomes the unknown in addition to x, y, z parameters foridentifying the three-dimensional position of the wrist device 200.Therefore, it is possible for the wrist device 200 to receive thesatellite signals (the radio waves) respectively transmitted from, forexample, three or more GPS satellites 8, then perform the positioningcalculation using the GPS time information and the orbital informationincluded in the satellite signals to obtain the location information atthe present location.

The portable device 300 as the exercise assistance device can beconstituted by, for example, a smartphone or a tablet-type terminaldevice. The portable device 300 is connected to the wrist device 200using the pulse wave sensor as the biological sensor which is aphotoelectric sensor, and the acceleration sensor as the body motionsensor with, for example, Near Field Communication such as Bluetooth(registered trademark), or wired communication (not shown). The portabledevice 300 is capable of receiving the measurement information from thewrist device 200, and then announcing the pulse wave information and thebody motion information, the location information, or the like of theuser thus processed. It should be noted that the portable device 300 canbe provided with a variety of modifications in implementation such asinclusion of a photoelectric sensor section 40 and a body motion sensorsection 170, a GPS receiving section 160, or the like included in thewrist device 200.

It should be noted that the wrist device 200 and the portable device 300in the present embodiment each have the Bluetooth function, and theportable device 300 and the wrist device 200 are connected with theBluetooth communication such as Bluetooth Low Energy (also referred toas Bluetooth 4.0). The Bluetooth Low Energy stresses a power savingproperty, and makes it possible to dramatically save the powerconsumption compared to the previous versions, and thus extend theavailable time of the wrist device.

Further, the portable device 300 can be connected to a server 400 suchas a PC (personal computer) or a server system via the network NE. Asthe network NE mentioned here, there can be used a variety of types ofnetwork NE such as a WAN (Wide Area Network), a LAN (Local AreaNetwork), a cellular phone communications network, or a Near FieldCommunication. In this case, the server 400 is realized as a processstorage section for receiving the pulse wave information and the bodymotion information measured by the wrist device 200 and the dataprocessed by the portable device 300 from the portable device 300 viathe network NE, and then storing the information and the data thusreceived.

It should be noted that in the embodiment described above, it issufficient for the wrist device 200 to be able to communicate with theportable device 300, and is not required to be directly connected to thenetwork NE. Therefore, it becomes possible to simplify the configurationof the wrist device 200. It should be noted that in the exerciseassistance system 100, it is also possible to adopt a modifiedimplementation of omitting the portable device 300 to directly connectthe wrist device 200 and the server 400 to each other. In this case, thewrist device 200 is provided with a function of processing themeasurement information included in the portable device 300, and afunction of transmitting the measurement information to the server 400and receiving the information from the server 400.

Further, the exercise assistance system 100 is not limited to what isrealized by a configuration including the server 400. For example, theprocess and the function realized by the exercise assistance system 100can also be realized by the portable device 300. The portable device 300such as a smartphone has limitations in processing performance, storagearea, and battery capacity compared to the server system in many cases,but it is conceivable that it becomes possible to ensure a sufficientprocessing performance taking the improvement in performance in recentyears into consideration. Therefore, as long as the requirement such asthe processing performance is satisfied, it is possible for the portabledevice 300 alone to realize the process and the function realized by theexercise assistance system 100 according to the present embodiment.

Further, the exercise assistance system 100 according to the presentembodiment is not limited to one realized by three devices. For example,the exercise assistance system 100 can also include two or more devicesout of the wrist device 200, the portable device 300, and the server400. In this case, the process performed by the exercise assistancesystem 100 can also be performed in either one of the devices, or canalso be performed by a plurality of devices in a distributed manner.Further, it is also possible for the exercise assistance system 100according to the present embodiment to include a different device fromthe wrist device 200, the portable device 300, and the server 400.Further, in the case of taking the improvement of the terminalperformance, utilization form or the like into consideration, it ispossible to achieve an embodiment in which the exercise assistancesystem 100 according to the present embodiment is realized by the wristdevice 200.

Further, the exercise assistance system 100 according to the presentembodiment includes a memory for storing the information (e.g., aprogram and a variety of types of data), and a processor operating basedon the information stored in the memory. In the processor, for example,the functions of respective sections can each be realized by individualhardware, or the functions of the respective sections can also berealized by integrated hardware. The processor can also be, for example,a CPU (Central Processing Unit). It should be noted that the processoris not limited to the CPU, but it is also possible to use a variety oftypes of processors such as a GPU (Graphics Processing Unit) or a DSP(Digital Signal Processor). Further, the processor can also be ahardware circuit constituted by an ASIC. The memory can be asemiconductor memory such as an SRAM (Static Random Access Memory) or aDRAM (Dynamic Random Access Memory), or can also be a register, or canalso be a magnetic storage device such as a hard disk drive, or can alsobe an optical storage device such as an optical disc drive. For example,the memory stores computer readable commands, and by the processorexecuting the commands, the functions of the respective sections of theexercise assistance system 100 are realized as a result. The commandshere can also be commands constituting the program, or can also becommands for instructing the operation to the hardware circuit of theprocessor.

3. Wrist Device According to First Embodiment

Then, a configuration of the wrist device (a measurement device) as theportable electronic apparatus according to the first embodiment will bedescribed with reference to FIG. 2 , FIG. 3 , FIG. 4 , FIG. 5 , FIG. 6 ,FIG. 7 and FIG. 8 . FIG. 2 is an external perspective view viewed fromthe obverse side (a display surface side) showing a schematicconfiguration of the wrist device according to the first embodiment.FIG. 3 is an external perspective view viewed from the reverse sideshowing the schematic configuration of the wrist device according to thefirst embodiment. FIG. 4 is a cross-sectional view showing aconfiguration of the wrist device according to the first embodiment.FIG. 5 is a plan view showing the configuration of the wrist deviceaccording to the first embodiment. FIG. 6 is a functional block diagramshowing a schematic configuration of the wrist device according to thefirst embodiment. FIG. 7 is a partial cross-sectional view showingArrangement Example 1 of the constituents of the wrist device accordingto the first embodiment. FIG. 8 is a partial cross-sectional viewshowing Arrangement Example 2 of the constituents of the wrist deviceaccording to the first embodiment.

It should be noted that in the following description of the wrist device200 according to the first embodiment, the description will be presenteddefining the side located on the object side to be the objective regionof the measurement of the biological information and so on when mountingthe device main body 30 on the user as “reverse side or reverse surfaceside,” and the display surface side of the device main body 30 to be theopposite side of the reverse side as “obverse side or obverse surfaceside.” Further, the “object (objective region)” to be measured isreferred to as a “test sample” in some cases. Further, a coordinatesystem is set based on a case 31 of the wrist device 200, the center ofthe display surface of a display section 50 is defined as an origin, andthe direction crossing the display surface of the display section 50from the reverse surface toward the obverse surface in the case ofdefining the display surface side of the display section 50 as theobverse surface is defined as a Z-axis positive direction (+Z-axisdirection). Alternatively, the direction from the photoelectric sensorsection 40 toward the display section 50, or the direction of gettingaway from the case 31 in the normal direction of light receivingsurfaces 80 a, 80 b, 80 c, and 80 d of panels constituting the solarcell 80 can also be defined as the Z-axis positive direction. In thestate in which the wrist device 200 is mounted on the test sample, theZ-axis positive direction described above corresponds to the directionfrom the test sample toward the case 31. Further, the two axesperpendicular to the Z axis are defined as X, Y axes, and in particular,the direction in which the band sections 10 are attached to the case 31is set as the Y axis. It should be noted that the light receivingsurfaces 80 a, 80 b, 80 c, and 80 d are surfaces through which the lightenters the solar cell 80.

FIG. 2 is a perspective view of the wrist device 200 in the state inwhich the band sections 10 are fixed viewed from the +Z-axis directioncorresponding to the obverse side (the display section 50 side) oppositeto the reverse side corresponding to the test sample side in the mountedstate. Further, FIG. 3 is a perspective view viewed from the −Z-axisdirection corresponding to the reverse side opposite to the side shownin FIG. 2 . Further, FIG. 4 is a cross-sectional view viewed from the+Y-axis direction. Further, FIG. 5 is a plan view viewed from the+Z-axis direction.

The wrist device 200 as the portable electronic apparatus is mounted ona predetermined region (the objective region of the measurement such asa wrist) of the user as shown in FIG. 2 , FIG. 3 and FIG. 4 , anddetects the pulse wave information, the body motion information, thelocation information, and so on. The wrist device 200 has the devicemain body 30 including the case 31 and made to adhere to the user todetect the pulse wave information, the body motion information and soon, and the pair of band sections 10 attached to the device main body 30to mount the device main body 30 on the user.

The device main body 30 including the case 31 is provided with thedisplay section 50, the solar cell 80 having an annular shape includingthe light receiving surfaces 80 a, 80 b, 80 c and 80 d of the panelsfacing to the +Z-axis direction disposed in the outer edge part of thedisplay section 50, and a measurement window section 45 corresponding tothe photoelectric sensor section 40 (see FIG. 4 ) as a biologicalinformation measurement section. It should be noted that it is alsopossible to arrange the display section 50 and a part of the solar cell80 so as to overlap each other in the planar view from the +Z-axisdirection (the normal direction of the light receiving surfaces 80 a, 80b, 80 c and 80 d). Further, on outer side surfaces of the device mainbody 30, there is disposed a plurality of operation sections (operationbuttons) 58, and a bezel 57 arranged so as to circularly surround theouter edge of the display section 50 is disposed. It should be notedthat the wrist device 200 is not limited to such a configuration, but avariety of modified implementations such as elimination of some of theconstituents or addition of other constituents can be adopted.

The device main body 30 has the case 31 provided with an opening section31 s opening on the obverse side. On the reverse side of the case 31,there is disposed the measurement window section 45 of the photoelectricsensor section 40 in the top part of a convex part 32 projecting fromthe reverse surface as the surface on the reverse side of the case 31.Further, the photoelectric sensor section 40 as the biologicalinformation measurement section is disposed at the positioncorresponding to the measurement window section 45 in the planar viewviewed from the +Z-axis direction, and a transparent cover 44 isinserted into the measurement window section 45. It should be noted thatthe transparent cover 44 can also protrude from the top part of theconvex part 32. Further, in the planar view viewed from the +Z-axisdirection, the measurement window section 45 is preferably disposed at aposition where the measurement window section 45 does not overlap thesolar cell 80. As described above, since the measurement window section45 of the photoelectric sensor section 40 is disposed at the positionwhere the measurement window section 45 does not overlap the solar cell80, the distance from the outer peripheral edge of the case 31 to thephotoelectric sensor section 40 becomes long to make the outside lightdifficult to reach the measurement window section 45, and thus, it ispossible to prevent the outside light from entering the measurementwindow section 45, and thus, it is possible to prevent the detectionaccuracy of the photoelectric sensor section 40 from degrading.

It should be noted that the case 31 can be formed of metal such asstainless steel, resin, or the like. It should be noted that theconfiguration of the case 31 is not limited to the integrated body, butcan also be a configuration in which the case 31 is divided into aplurality of regions such as the case 31 having a two-body structure inwhich a back lid is disposed on the side on which the case 31 is mountedon the user.

In the device main body 30, the bezel 57 is disposed on the outercircumference side of a projecting part 34 erected so as to projecttoward the +Z-axis direction in the outer edge of the opening section 31s of the case 31 located on the obverse side of the device main body 30,and at the same time, a windshield plate (a glass plate in this example)55, which is a transparent plate as a top plate part for protecting theinternal structure, is disposed inside the bezel 57. The windshieldplate 55 is disposed so as to close the opening of the case 31 in aplanar view viewed from a direction of facing right to the lightreceiving surfaces 80 a, 80 b, 80 c, and 80 d of the solar cell 80, inother words, the +Z-axis direction. The windshield plate 55 is attachedto the inner edge side of the projecting part 34 of the case 31 with abonding member 56 such as a packing or an adhesive. Further, an internalspace 36 as a closed space is disposed in the inside of the case 31surrounded by the case 31 and the windshield plate 55 for closing theopening of the case 31.

It should be noted that the windshield plate 55 is not limited to theglass plate, but can also be formed of other materials than glass suchas transparent plastic providing the materials have such strength as toprotect the constituents housed in the internal space 36 such as aliquid crystal display (a display panel 60) constituting the displaysection 50.

Further, as shown in FIG. 4 , in the internal space 36 inside the case31, there are housed, for example, a circuit board 20, an orientationsensor 22 and an acceleration sensor 23 as sensors included in the bodymotion sensor section 170 (see FIG. 6 ), a GPS antenna 28 as an antennasection, the photoelectric sensor section 40, the liquid crystal display(hereinafter referred to as the display panel 60) constituting thedisplay section 50, an illumination section 61 for the display panel 60,a secondary cell 70 (a lithium secondary cell), and the solar cell 80 asthe constituents of the wrist device 200. It should be noted that thedevice main body 30 is not limited to the configuration shown in FIG. 4, but it is possible to add other sensors such as a barometric sensorfor calculating the altitude or a temperature sensor for measuring thetemperature, a vibrator, and so on. Further, to the circuit board 20,there are connected connection wiring to the constituents describedabove, a CPU (Central Processing Unit) 21 as a processing section(processor), and other circuit elements 24, wherein the processingsection includes a control circuit including a control circuit forcontrolling a variety of sensors and the display section 50 constitutingthe wrist device 200, a drive circuit, and so on. It should be notedthat the CPU 21 as the processing section is electrically connected tothe variety of sensors such as the photoelectric sensor section 40 andthe acceleration sensor 23, and is capable of processing the signalsdetected by the respective sensors. Further, the CPU 21 is electricallyconnected to the display panel 60 constituting the display section 50,and is capable of controlling display of the display panel 60. Further,it is also possible to connect the orientation sensor 22 and theacceleration sensor 23 to the circuit board 20.

Out of the constituents of the wrist device 200 disposed in the internalspace 36, the circuit board 20, the photoelectric sensor section 40, thedisplay panel 60, the secondary cell 70 and the solar cell 80 aredisposed in a direction from the windshield plate 55 side toward the−Z-axis direction in the order of the solar cell 80, the display panel60, the circuit board 20, the secondary cell 70 and the photoelectricsensor section 40. It should be noted that the solar cell 80 is disposedso as to cover at least a part of the display section 50.

By disposing the display panel 60 constituting the display section 50between the solar cell 80 and the circuit board 20 in the case 31 asdescribed above, it is possible for the user to visually recognize thedisplay of the display section 50 with ease without being shaded by thecircuit board 20.

Further, it is preferable for the outer circumferential end part of thedisplay panel 60 electrically connected to the CPU 21 to be disposedbetween the outer circumference 80 os as the outer edge part shaped likea circle of the solar cell 80 described later and the innercircumference 80 is shaped like a circle as the inner edge part in aplanar view viewed from the +Z-axis direction. By disposing the outercircumferential end part of the display panel 60 between the outercircumference 80 os and the inner circumference 80 is of the solar cell80, in other words, by overlapping the outer circumferential end part ofthe display panel 60 with the solar cell 80 as described above, in theplanar view viewed from the +Z-axis direction, it is possible to improvethe arrangement balance between the solar cell 80 and the displaysection 50 (the display panel 60), and it is possible to ensure thelarge area of the solar cell 80 while keeping the area of the displaysection 50. Further, by disposing the end part of the display section 50so as to be covered with the solar cell 80, the end part of the displaysection 50 can be concealed, and thus the sensuousness can be improved.

Further, by disposing the display panel 60 constituting the displaysection 50 between the solar cell 80 and the photoelectric sensorsection 40 in the inside of the case 31, it is possible for the displaypanel 60 to shade the so-called stray light which is the light incomingtoward the solar cell 80 for generating electric power, and thenentering the case 31 from the solar cell 80 side as leakage lightentering through a gap or the like, and thus, it is possible to reducethe influence of the outside light (the stray light) on thephotoelectric sensor section 40.

Further, by disposing the secondary cell 70 between the display section50 and the photoelectric sensor section 40 in the inside of the case 31,it is possible for the secondary cell 70 to shade the stray light whichis the light incoming for generating the electric power and thenentering the case 31 from the solar cell 80 side, and thus, it ispossible to reduce the influence of the outside light on thephotoelectric sensor section 40.

The GPS antenna 28 as the antenna section for receiving the positioningsatellite signals includes a base 26 formed of, for example, a resinmember as a nonconductive member, and a conductive body 27 formed ofmetal such as copper, a copper alloy, aluminum, or an aluminum alloy anddisposed on the surface located on the windshield plate 55 side (the+Z-axis direction) of the base 26. As shown in FIG. 5 , the base 26 isdisposed so as to curve along the inner circumference of the openingsection 31 s of the case 31 in the 12-o'clock direction (the +Y-axisdirection), and is disposed so as to overlap the solar cell 80 in aplanar view viewed from the normal direction (the +Z-axis direction) ofthe light receiving surfaces 80 a, 80 b, 80 c and 80 d of the solar cell80. In the GPS antenna 28, by using the base 26 having the nonconductiveproperty as a dielectric body to use the wavelength shortening effectdue to the base 26 (the dielectric body), the antenna is constituted.Since such an antenna can compactly be configured with the base 26 andthe conductive body 27 disposed on the surface of the base 26, it ispossible to miniaturize the GPS antenna 28.

It should be noted that the GPS antenna 28 is preferably disposed on theouter side (on the outer circumference side of the case 31) of thecontour of the display section 50, in other words, the innercircumference 80 is of the solar cell 80 described later in the planarview viewed from the +Z-axis direction. By disposing the GPS antenna 28on the outer circumference side of the case 31 as described above, it ispossible to increase the degree of freedom of the arrangement layout ofthe display section 50, the solar cell 80, and so on, and thus, it ispossible to more effectively arrange the display section 50, the solarcell 80, and so on.

Further, in the planar view viewed from the +Z-axis direction, it ispreferable to dispose at least a part of the base 26 so as to overlapthe solar cell 80 (the light receiving surfaces 80 a, 80 b, 80 c, and 80d). By adopting such an arrangement, it is possible to improve thereceiving sensitivity of the GPS antenna 28 due to the capacitivecoupling between the base 26 and the solar cell 80.

Further, it is preferable for the GPS antenna 28 to be disposed betweenthe solar cell 80 and the circuit board 20 in a cross-sectional viewviewed from a direction (the X-axis direction) perpendicular to thenormal direction (the +Z-axis direction) of the light receiving surfaces80 a, 80 b, 80 c, and 80 d of the solar cell 80. By adopting such anarrangement, it is possible to use the wavelength shortening effect byusing the circuit board 20 as the dielectric body in addition to thebase 26, and thus, it is possible to make the GPS antenna 28 morecompact (smaller in size). Further, due to the capacitive couplingbetween the GPS antenna 28 and the circuit board 20, it is possible toimprove the receiving sensitivity of the GPS antenna 28.

Further, the GPS antenna 28 is electrically connected to the CPU 21 asthe processing section supported by the circuit board 20 via aconnection section 25 as a contact point supported by the circuit board20 in the conductive body 27. Due to such connection, the electricalconnection between the CPU 21 and the GPS antenna 28 as a separatemember can compactly be achieved on the circuit board 20. Further, it ispreferable for the connection section 25 as the contact point to bedisposed so as to overlap the solar cell 80 in the planar view viewedfrom the +Z-axis direction. By disposing the connection section 25 so asto overlap the solar cell 80 in the planar view viewed from the +Z-axisdirection, it is possible to increase the degree of freedom of thearrangement layout of the GPS antenna 28 and the CPU 21, and at the sametime, achieve the compact arrangement. Further, it is possible toincrease the light receiving area of the solar cell 80 without affectingthe receiving sensitivity of the GPS antenna 28, and thus, it ispossible to increase the production of electricity in the solar cell 80.

Further, the conductive body 27 is not required to be disposed on theentire area of the obverse surface located on the windshield plate 55side (the +Z-axis direction) of the base 26, but is sufficient to bedisposed at least a part of the surface. Further, it is also possiblefor the conductive body 27 to be disposed on the side surface or thereverse surface in addition to the obverse surface located on thewindshield plate 55 side (the +Z-axis direction) of the base 26.

Further, as shown in FIG. 7 , it is preferable for the circuit board 20,the photoelectric sensor section 40, and the solar cell 80 to have anarrangement in which the distance L2 (the shortest distance between thecircuit board 20 and the solar cell 80) between the circuit board 20 andthe solar cell 80 becomes longer than the distance L1 (the shortestdistance between the circuit board 20 and the photoelectric sensorsection 40) between the circuit board 20 and the photoelectric sensorsection 40 in a cross-sectional view viewed from the −Y-axis directionas a direction perpendicular to the +Z-axis direction (the normaldirection of the light receiving surfaces 80 a, 80 b, 80 c, and 80 d).By making the distance L2 between the circuit board 20 and the solarcell 80 longer as described above, it becomes difficult for the solarcell 80 to be affected by the heat generation of the circuit board 20 orother constituents. Therefore, the rise in temperature of the solar cell80 can be suppressed, and thus, the deterioration of the powergeneration efficiency in the solar cell 80 can be prevented.

Further, as shown in FIG. 8 , it is also possible for the circuit board20, the photoelectric sensor section 40, and the solar cell 80 to havean arrangement in which the distance L2 (the shortest distance betweenthe circuit board 20 and the solar cell 80) between the circuit board 20and the solar cell 80 becomes shorter than the distance L1 (the shortestdistance between the circuit board 20 and the photoelectric sensorsection 40) between the circuit board 20 and the photoelectric sensorsection 40 in a cross-sectional view viewed from the −Y-axis directionas a direction perpendicular to the +Z-axis direction (the normaldirection of the light receiving surfaces 80 a, 80 b, 80 c, and 80 d).By making the distance L2 between the circuit board 20 and the solarcell 80 shorter as described above, it is possible to suppress thetransmission loss of the electric power generated in the solar cell 80to improve the charging efficiency.

Further, by disposing the circuit board 20 between the solar cell 80 andthe photoelectric sensor section 40 in the inside of the case 31, it ispossible for the circuit board 20 to shade the so-called stray lightwhich is the light incoming toward the solar cell 80 for generating theelectric power, then entering the case 31 from the solar cell 80 side asleakage light entering through a gap or the like, and thus, it ispossible to reduce the influence of the outside light (the stray light)on the photoelectric sensor section 40.

The constituents of the wrist device 200 according to the firstembodiment will hereinafter be described in further detail withreference also to the functional block diagram shown in FIG. 6 .

The circuit board 20 includes an obverse surface 20 f (a first surface),and a reverse surface 20 r (a second surface) which is a surfacedifferent from the obverse surface 20 f, and is a surface on theopposite side to the obverse surface 20 f. An end part on the outercircumference side of the circuit board 20 is attached to a circuit case75 as a circuit fixation section, and thus, the circuit board 20 issupported inside the case 31 via the circuit case 75. On the obversesurface 20 f of the circuit board 20, there are mounted the orientationsensor 22 and the acceleration sensor 23 as the sensors included in thebody motion sensor section 170, the CPU 21 as the control circuit, andso on, and on the reverse surface 20 r, there are mounted other circuitelements 24 and so on, wherein the constituents are electricallyconnected to each other. Since the circuit board 20 is supported by thecase 31 on the outer circumference side of the circuit board 20 asdescribed above, it is easy for the vibration from the case 31 topropagate to the acceleration sensor 23 connected to the circuit board20, and it is possible to further improve the detection accuracy oftapping detection by the acceleration sensor 23. Further, in an end partof the obverse surface 20 f of the circuit board 20, there is supported(connected) the connection section 25 as the contact point forelectrically connecting the GPS antenna 28 and the CPU 21 to each other.

Further, the display panel 60 and the solar cell 80 are connected to theobverse surface 20 f of the circuit board 20 respectively via aconnection wiring section 63 and a connection wiring section 81 eachformed of a flexible board or the like. Further, the photoelectricsensor section 40 is electrically connected to the reverse surface 20 rof the circuit board 20 as a surface on the opposite side to the obversesurface 20 f via a connection wiring section 46 formed of a flexibleboard or the like. By adopting such an arrangement, it is possible tominimize the laying of the wiring for the connection, and at the sametime shade the stray light which is the light incoming for generatingthe electric power and entering the case as the leakage light from thesolar cell 80 side using the circuit board 20, and thus, it is possibleto reduce the influence of the outside light on the photoelectric sensorsection 40. It should be noted that the circuit case 75 can guide thesecondary cell 70 and so on.

The orientation sensor (the geomagnetic sensor) 22 and the accelerationsensor 23 included in the body motion sensor section 170 are capable ofdetecting the information related to the motion of the body of the user,namely the body motion information. The orientation sensor (thegeomagnetic sensor) 22 and the acceleration sensor 23 each output a bodymotion detection signal as a signal varying in accordance with the bodymotion such as a displacement or a change in direction of the user, andthen transmit the body motion detection signal to the CPU 21 as theprocessing section including the control circuit. It should be notedthat in addition to the detection related to the motion such as adisplacement of the user, the acceleration sensor 23 is also capable ofdetecting a so-called tapping motion for achieving indication ofintention of the operation by applying a light impact to the case 31using, for example, a motion of tapping the outer circumferential partof the case 31, the windshield plate 55 or the like by the user with afingertip.

Further, as shown in FIG. 5 , it is preferable for the accelerationsensor 23 to be disposed at the position where at least a part of theacceleration sensor 23 overlaps the solar cell 80 in the planar viewviewed from the +Z-axis direction. In other words, it is preferable forthe acceleration sensor 23 to be mounted, therefore, at a position closeto the outer circumference side of the circuit board 20, in other words,to the inner wall (inner circumference) of the case. Alternatively, itis preferable for the acceleration sensor 23 to be disposed at theposition where the distance between the region where the circuit case 75has contact with the circuit board 20 and the center of the accelerationsensor 23 is shorter than the distance between the center of theacceleration sensor 23 and the center of the circuit board 20 as shownin FIG. 4 . By disposing the acceleration sensor 23 as described above,it becomes easy for the impact such as the tapping motion received bythe case 31 to propagate to the acceleration sensor 23 via the circuitboard 20 supported by the case 31 on the outer circumference side of thecircuit board 20, and it is possible to further improve the detectionaccuracy by the acceleration sensor 23.

The CPU 21 as the processing section constitutes a circuit forcontrolling the GPS receiving section 160 including the GPS antenna 28,a circuit for driving the photoelectric sensor section 40 to measure thepulse wave, a circuit for driving the display section 50 (the displaypanel 60), a circuit for driving the body motion sensor section 170 andprocessing the signal detected to obtain the body motion information, acontrol circuit for controlling a power generation circuit in the solarcell 80, and so on. Further, the CPU 21 transmits the pulse waveinformation, the body motion information, the location information ofthe user, and so on detected in the respective regions to acommunication section 29 as needed.

The GPS antenna 28 is included in the GPS receiving section 160 togetherwith a signal processing section 66, and receives the plurality ofsatellite signals. The signal processing section 66 performs thepositioning calculation based on the plurality of satellite signalsreceived by the GPS antenna 28 to obtain the result as the locationinformation of the user.

The communication section 29 transmits the pulse wave information, thebody motion information, and the location information of the usertransmitted from the CPU 21 to the portable device 300, and so on asneeded.

The photoelectric sensor section 40 as the biological informationmeasurement section is for detecting the pulse wave and so on, andincludes a light receiving section 41 and a plurality of (two in thepresent embodiment) light emitting sections 42 disposed on both sides ofthe light receiving section 41, in other words, on the outer sides (theouter circumference sides of the case 31) of the light receiving section41 in a planar view. By disposing the light receiving section 41 on theinner side of the light emitting sections 42 as described above, it ispossible to prevent the outside light incoming from the outercircumference side of the case 31 from entering the light receivingsection 41, and thus, it is possible to reduce the influence of theoutside light on the photoelectric sensor section 40. It should be notedthat the number of the light emitting sections 42 is not limited to two,but can also be one, three, or more. The light receiving section 41 andthe two light emitting sections 42 are attached to one surface of asensor substrate 43, and are covered with the transparent cover 44formed of a member which is formed of, for example, light curing resin,and transmits light. The transparent cover 44 has a part including anarea corresponding to the light receiving section 41 and the two lightemitting sections 42, and the part of the transparent cover 44 isinserted into the measurement window section 45 provided to the case 31.It should be noted that the transparent cover 44 can also protrude fromthe top part of the convex part 32 of the case 31.

In the photoelectric sensor section 40, by irradiating the test sample(the object of the measurement) with the light emitted from the lightemitting sections 42 as described above, and receiving the reflectedlight therefrom with the light receiving section 41, it is possible todetect the pulse wave information. The photoelectric sensor section 40outputs the signal detected by the pulse wave sensor including the lightemitting sections 42 and the light receiving section 41 as a pulse wavedetection signal. As the photoelectric sensor section 40, there is used,for example, a photoelectric sensor. In this case, it is possible toadopt a method of detecting the reflected light or the transmitted lightof the light with which the living body (the wrist of the user) isirradiated by the light emitting sections 42, using the light receivingsection 41. According to such a method as described above, since anamount of absorption and an amount of reflection of the light with whichthe living body is irradiated are different by the blood flow in theblood vessels, the sensor information detected by the photoelectricsensor becomes a signal corresponding to the blood flow or the like, andby analyzing the signal, it is possible to obtain the informationrelated to the pulsation. It should be noted that the pulse wave sensoris not limited to the photoelectric sensor, and it is possible to useother sensors such as an electrocardiograph or an ultrasonic sensor.

Further, the photoelectric sensor section 40 is disposed at a positionwhere the photoelectric sensor section 40 does not overlap the solarcell 80 formed to have an annular shape in the planar view viewed fromthe direction (+Z-axis direction) facing right to the light receivingsurfaces 80 a, 80 b, 80 c, and 80 d of the solar cell 80 as shown inFIG. 5 . In other words, the solar cell 80 is disposed on the outer sideof the outer edge of the photoelectric sensor section 40, and isdisposed at a position where the solar cell 80 and the photoelectricsensor section 40 do not overlap each other in the planar view viewedfrom +Z-axis direction. In still other words, the solar cell 80 isdisposed between the bezel 57 and the photoelectric sensor section 40 inthe planar view viewed from the +Z-axis direction. Here, the outer edgeof the photoelectric sensor section 40 preferably denotes the outer edgeof the area indicated by oblique hatching in FIG. 5 , including theouter edges of at least the light receiving section 41 and the two lightemitting sections 42, and connecting the respective outer edges to eachother. It should be noted that in the present embodiment, it is possibleto define the outer edge of the measurement window section 45 includingthe light receiving section 41 and the two light emitting sections 42 asthe outer edge of the photoelectric sensor section 40. Further, it isalso possible to define the outer edge of the sensor substrate 43 as theouter edge of the photoelectric sensor section 40. Further, it is alsopossible to define the outer edge of the transparent cover 44 as theouter edge of the photoelectric sensor section 40.

It results that the solar cell 80 disposed to have the annular shape isdisposed on the outer side of the outer edge of the photoelectric sensorsection 40 so as to surround the photoelectric sensor section 40 in theplanar view viewed from +Z-axis direction, in other words, thephotoelectric sensor section 40 is disposed at a central part of thecase 31 in the planar view, or the distance from the photoelectricsensor section 40 to the inner wall (inner circumference) of the case 31is longer than the distance from the outer circumference 80 os of thesolar cell to the inner wall (the inner circumference) of the case 31,and thus, it is possible to suppress the influence of the outside light(the leakage light) in the photoelectric sensor section 40. Thus, sinceit is possible to dispose the solar cell 80 without deteriorating thedetection accuracy of the photoelectric sensor section 40, it ispossible to achieve both of the detection accuracy of the biologicalinformation by the photoelectric sensor section 40 and the efficientelectric power generation by the solar cell 80. Further, since the solarcell 80 is disposed on the outer side of the outer edge of thephotoelectric sensor section 40 in the planar view, the arrangementbalance for making it easy to perform the detection by the photoelectricsensor section 40 while efficiently performing the electric powergeneration in the solar cell 80 is improved, and it is possible toimprove the mountability of the device main body 30 of the wrist device200 to the user. Further, it is also possible to define the outer edgeof the transparent cover 44 as the outer edge of the photoelectricsensor section 40. It should be noted that the expression of “notoverlap” described above denotes the state in which S=0 is true definingthe area where the solar cell 80 and the photoelectric sensor section 40overlap each other in the planar view viewed from the +Z-axis directionas S. Further, the expression that the photoelectric sensor section 40is surrounded by the solar cell 80 can include the case in which thephotoelectric sensor section 40 is surrounded by a plurality of solarcells 80, and it is also possible to include the case in which the solarcell 80 is divided, or the case in which a cut is provided. Here, thecase in which a concentric circle is drawn with respect to the centroidof the photoelectric sensor section 40 in the planar view viewed fromthe +Z-axis direction and the proportion of the overlap between theconcentric circle and the solar cell 80 to the circumference of theconcentric circle is equal to or higher than 50% can also be defined as“surrounded.”

Further, it is preferable for at least a part of the photoelectricsensor section 40 to be disposed so as to overlap the centroid G of thesolar cell 80 in the planar view viewed from the +Z-axis direction asshown in FIG. 5 . Due to such an arrangement of the photoelectric sensorsection 40 and the solar cell 80 as described above, the balance (thecentroid position) of the device main body 30 becomes in a favorablecondition, and thus, the mountability to the user can be improved. Itshould be noted that the centroid G can be rephrased as the center ofmass, and in the case of a three-dimensional object, the centroid G canbe defined in a structure of the three-dimensional object or in a spacein some cases. Further, the expression of “overlapping the centroid” canbe defined as the state in which overlap occurs when projecting theposition of the centroid on a two-dimensional plane or a predeterminedobject in the case of being viewed from a predetermined direction.

The display section 50 is disposed in an area on the center side of theinner circumference 80 is of the solar cell 80 disposed to form anannular shape via the windshield plate 55. The display section 50 isprovided with a configuration in which the user can visually recognize anumber, an icon, or display such as a time displaying indicatordisplayed on a display member such as the display panel 60 disposedimmediately below the windshield plate 55 via the windshield plate 55.Therefore, in the present embodiment, a variety of types of informationsuch as the biological information, the information representing theexercise state, or the time information thus detected are displayedusing the display panel 60 to present the display described above to theuser from the obverse side (the +Z-axis direction). It should be notedthat as the display member, there can be used an organic EL (OrganicElectro-Luminescence) display, an electrophoretic display (EPD), an LED(Light Emitting Diode) display, and so on instead of the display panel60 as the liquid crystal display.

The illumination section 61 functions as a backlight of the displaypanel 60. The illumination section 61 is connected to the obversesurface 20 f (the first surface) of the circuit board 20. By connectingthe illumination section 61 to the circuit board 20 in such a manner, itis possible to minimize the laying of the wiring for the connection, andat the same time, the light emitted from the illumination section 61 isshaded by the circuit board 20, and thus, the influence of the straylight on the photoelectric sensor section 40 can be reduced.

The secondary cell 70 has terminals of the both polarities connected tothe circuit board 20 with a connection board (not shown) or the like,and supplies the circuit for controlling the power source with theelectric power. Further, the secondary cell 70 is electrically connectedto the solar cell 80 via the circuit board 20. The electric power isconverted into a predetermined voltage in this circuit and is thensupplied to each circuit to make the circuit for driving thephotoelectric sensor section 40 to detect the pulsation, the circuit fordriving the display panel 60, the control circuit (the CPU 21) forcontrolling each circuit, and so on operate. Charging to the secondarycell 70 is performed via a pair of charging terminals electricallyconnected to the circuit board 20 with a conductive member (not shown)such as a coil spring, or performed using the electric power generatedby the solar cell 80.

Further, the secondary cell 70 is preferably disposed at a positionwhere the secondary cell 70 does not overlap the solar cell 80 in theplanar view viewed from the +Z-axis direction. By disposing thesecondary cell 70 at the position where the secondary cell 70 does notoverlap the solar cell 80 in the planar view viewed from the +Z-axisdirection as described above, it becomes difficult for the solar cell 80to be affected by the heat generation caused in charging the secondarycell 70, and thus, the rise in temperature of the solar cell 80 can besuppressed. Therefore, it is possible to increase the power generationefficiency in the solar cell 80.

The solar cell 80 converts the light energy of the outside light such assunlight using the photovoltaic effect to generate the electric power.The solar cell 80 in the present embodiment is disposed between thewindshield plate 55 and the display panel 60 so as to be divided intofour panels, and is arranged so that the light receiving surfaces 80 a,80 b, 80 c, and 80 d of the respective panels face to the +Z-axisdirection. The solar cell 80 is located in the outer peripheral part(the outer edge part of the display section 50) including the outer edgeof the display panel 60, in other words, on the outer circumference sideof the case 31, and is configured to form a so-called annular shape (aring-like shape) provided with a through hole in the central part.

Specifically, as shown in FIG. 5 , the solar cell 80 is located on theopening section 31 s side of the case 31, and has the outercircumference 80 os as the outer edge part shaped like a circular shapeshorter than the inner circumferential length of the opening section 31s, the inner circumference 80 is having a circular shape as the inneredge part shorter in circumferential length than the outer circumference80 os, and two lateral sides 80 ss connecting the outer circumference 80os and the inner circumference 80 is to each other on the both sides,and is disposed in the outer peripheral part of the display panel 60.Specifically, in each of the panels respectively having the lightreceiving surfaces 80 a, 80 b, 80 c, and 80 d, there is provided theinner circumference shorter in circumferential length than the outercircumference. It should be noted that it is possible to rephrase thatone shorter in radius out of the concentric circles of the solar cell 80in the planar view viewed from the +Z-axis direction corresponds to theinner circumference, and one longer in radius corresponds to the outercircumference. The solar cell 80 in the present configuration isconfigured by disposing the four panels respectively having such lightreceiving surfaces 80 a, 80 b, 80 c and 80 d along the innercircumference of the opening section 31 s of the case 31. Further, it isalso possible to add the outer circumferences 80 os of the four panelsconstituting the solar cell 80 to obtain the outer circumferentiallength of the solar cell 80, and add the inner circumferences 80 is ofthe four panels to obtain the inner circumferential length of the solarcell 80. Due to such an annular arrangement of the solar cell 80, it ispossible to efficiently arrange the display area of the display section50, and by extension, it is possible to improve the design of the wristdevice 200.

It should be noted that although in the present configuration, there isillustrated the solar cell 80 having the annular shape using the fourpanels, it is also possible for the solar cell 80 to be formed of anintegrated panel. Further, in the case of constituting the solar cell 80by a plurality of panels, the number of panels does not matter. Further,the solar cell 80 can also be formed of a film instead of the panel.

Further, it is preferable for at least a part of the connection section25 as the contact point for electrically connecting the GPS antenna 28and the CPU 21 supported by the circuit board 20 to each other to bedisposed between the outer circumference 80 os as the outer edge partand the inner circumference 80 is as the inner edge. Due to such anarrangement of the connection section 25, it is possible to increase thedegree of freedom of the arrangement layout of the GPS antenna 28 andthe CPU 21 as the processing section, and at the same time, it ispossible to improve the receiving sensitivity of the GPS antenna 28 dueto the capacitive coupling between the GPS antenna 28 and the solar cell80.

Further, the shape of the panel constituting the solar cell 80 does notmatter unless the visibility of the display section 50 is damaged, orthe design is damaged. For example, it is also possible to constitutethe outer circumference side of each of the panels with straight linesobtained by dividing the outer circumference side at a position alongthe inner circumference of the opening section 31 s into two equalparts, and thus, constitute the outer circumference side of all of thefour panels with straight lines obtained by dividing the outercircumference side at positions along the inner circumference of theopening section 31 s into eight equal parts, or to constitute the outercircumference side of each of the panels with straight lines obtained bydividing the outer circumference side at positions along the innercircumference of the opening section 31 s into three equal parts, andthus, constitute the outer circumference side of all of the four panelswith straight lines obtained by dividing the outer circumference side atpositions along the inner circumference of the opening section 31 s intotwelve equal parts. Alternatively, it is also possible to divide theinner circumference of the panel into two equal parts, or three equalparts. Further, it is also possible to divide the inner circumferenceand the outer circumference into two equal parts, or three equal parts.Further, it is also possible to use a panel having a linear outercircumference or a linear inner circumference, and a panel not havingsuch circumferences in combination with each other.

A storage section 180 stores the biological information such as thepulse wave due to the photoelectric sensor section 40, the locationinformation due to the GPS receiving section 160, the body motioninformation due to the body motion sensor section 170, and so on inaccordance with the control of the CPU 21.

According to the wrist device 200 related to the first embodiment of theportable electronic apparatus described above, by using the wavelengthshortening effect due to the base 26 using the base 26 formed of thenonconductive member as the dielectric body, there is applied the GPSantenna 28 small in size and compactly constituted by the base 26 andthe conductive body 27 disposed on the surface of the base 26. Further,since at least a part of the base 26 of the GPS antenna 28 for receivingthe satellite signals related to the signals for positioning to beobtained by the CPU 21 as the processing section supported by thecircuit board 20 is disposed so as to overlap the solar cell 80 in theplanar view viewed from the +Z-axis direction, it becomes possible tohouse the constituents such as the solar cell 80 and the GPS antenna 28in the case 31 also in the wrist device 200 as the small-sized portableelectronic apparatus.

Further, by disposing the connection section 25 (the contact point) forelectrically connecting the GPS antenna 28 and the CPU 21 to each otherso as to overlap the solar cell 80 in the planar view viewed from the+Z-axis direction, it is possible to increase the degree of freedom ofthe arrangement layout of the GPS antenna 28 and the CPU 21, and at thesame time, achieve the compact arrangement. Further, it is possible toincrease the light receiving area of the solar cell 80 without affectingthe receiving sensitivity of the GPS antenna 28, and thus, it ispossible to increase the production of electricity in the solar cell 80.

4. Wrist Device According to Second Embodiment

Then, a configuration of a wrist device (a measurement device) as theportable electronic apparatus according to a second embodiment will bedescribed with reference to FIG. 9 . FIG. 9 is a cross-sectional viewshowing a configuration of the wrist device according to the secondembodiment. FIG. 10 is a plan view showing the configuration of thewrist device according to the second embodiment. It should be noted thatin the following description related to the second embodiment, thedescription will be presented with a focus on the configurationdifferent from that of the first embodiment described above, andsubstantially the same configuration will be denoted by the samereference numerals in each of the drawings, and the description thereofwill be omitted in some cases.

The wrist device 200A according to the second embodiment shown in FIG. 9and FIG. 10 is different from the wrist device 200 according to thefirst embodiment described above in the configuration and thearrangement of a GPS antenna 28A, and accordingly, a supportconfiguration of a circuit board 20A is different from that of the firstembodiment. The other parts of the configuration are substantially thesame as those of the wrist device 200 according to the first embodimentdescribed above. Hereinafter, the description will be presented with afocus on the different parts of the configuration, namely the GPSantenna 28A and the support configuration of the circuit board 20A.

Similarly to the first embodiment, the device main body 30 of the wristdevice 200A according to the second embodiment has the case 31 providedwith the opening section 31 s opening on the obverse side, and themeasurement window section 45 of the photoelectric sensor section 40 isdisposed on the reverse side. The opening section 31 s of the case 31 isclosed by the windshield plate (a glass plate in the present embodiment)55 which is the transparent plate as a top plate part for protecting theinternal structure. Thus, the inside of the case 31 becomes the internalspace 36 as a closed space disposed inside the case 31 surrounded by thecase 31 and the windshield plate 55. Further, as shown in FIG. 9 , theconstituents of the wrist device 200A are housed in the internal space36 located inside the case 31, but are substantially the same as thoseof the first embodiment, and therefore, the detailed description thereofwill be omitted.

The GPS antenna 28A as the antenna section includes a base 26A formedof, for example, a resin member as a nonconductive member, and aconductive body 27A formed of metal such as copper, a copper alloy,aluminum, or an aluminum alloy and disposed on the obverse surfacelocated on the windshield plate 55 side (the +Z-axis direction) of thebase 26A. The base 26A has a shape such as an annular shape along theinner circumference of the opening section 31 s of the case 31, or anannular shape obtained by combining circular arc-shaped members witheach other along the inner circumference of the opening section 31 s,and is fixed to the inner wall of the case 31. It should be noted thatthe base 26A is arranged so as to overlap the solar cell 80 in theplanar view viewed from the normal direction of the light receivingsurfaces 80 a, 80 b, 80 c and 80 d of the solar cell 80 (the +Z-axisdirection). The conductive body 27A is formed of a metal thin platehaving a roughly disc-like shape, and the outer circumferential part ofthe conductive body 27A is connected to the obverse surface located onthe windshield plate 55 side (+Z-axis direction) of the base 26A. In theGPS antenna 28A, by using the base 26A having the nonconductive propertyas a dielectric body to use the wavelength shortening effect due to thebase 26A (the dielectric body), the antenna is constituted. Such anantenna can be configured to be low-profile using the base 26A and theconductive body 27A disposed so as to include the obverse surface of thebase 26A.

It should be noted that the base 26A constituting the GPS antenna 28A ispreferably disposed on the outer side (on the outer circumference sideof the case 31) of the contour of the display section 50, in otherwords, the inner circumference 80 is of the solar cell 80 describedlater in the planar view viewed from the +Z-axis direction. By disposingthe base 26A on the outer circumference side of the case 31 as describedabove, it is possible to increase the degree of freedom of thearrangement layout of the display section 50, the solar cell 80, and soon, and thus, it is possible to more effectively arrange the displaysection 50, the solar cell 80, and so on.

Further, the GPS antenna 28A is electrically connected to the CPU 21supported by the circuit board 20A via a connection section 25A as acontact point supported by the circuit board 20A. Due to suchconnection, the electrical connection between the CPU 21 and the GPSantenna 28A as a separate member can compactly be achieved on thecircuit board 20A. Further, it is preferable for the connection section25A as the contact point to be disposed so as to overlap the solar cell80 in the planar view viewed from the +Z-axis direction. By disposingthe connection section 25A so as to overlap the solar cell 80 in theplanar view viewed from the +Z-axis direction, it is possible toincrease the degree of freedom of the arrangement layout of the GPSantenna 28A and the CPU 21, and at the same time, achieve the compactarrangement. Further, it is possible to increase the light receivingarea of the solar cell 80 without affecting the receiving sensitivity ofthe GPS antenna 28A, and thus, it is possible to increase the productionof electricity in the solar cell 80.

Further, the conductive body 27A can be disposed not only on the obversesurface side located on the windshield plate 55 side (the +Z-axisdirection) of the base 26A, but also on the reverse surface sideopposite to the obverse surface side. Further, it is also possible todispose the conductive body 27A on both of the obverse surface side andthe reverse surface side.

The circuit board 20A includes an obverse surface 20 f (a firstsurface), and a reverse surface 20 r (a second surface) which is asurface different from the obverse surface 20 f, and is a surface on theopposite side to the obverse surface 20 f. An end part on the outercircumference side of the circuit board 20A is attached to a circuitcase 75A as a circuit fixation section, and thus, the circuit board 20Ais supported inside the case 31 via the circuit case 75A. On the obversesurface 20 f of the circuit board 20, there are mounted the orientationsensor 22 and the acceleration sensor 23 as the sensors included in thebody motion sensor section 170, the CPU 21 as the control circuit, andso on, and on the reverse surface 20 r, there are mounted other circuitelements 24 and so on, wherein the constituents are electricallyconnected to each other. Further, in an end part of the obverse surface20 f of the circuit board 20A, there is supported (connected) theconnection section 25A as the contact point for electrically connectingthe GPS antenna 28A and the CPU 21 to each other.

According to the wrist device 200A related to the second embodiment ofthe portable electronic apparatus described above, by using thewavelength shortening effect due to the base 26A using the base 26Aformed of the nonconductive member as the dielectric body, it ispossible to realize the GPS antenna 28A configured to be low-profileusing the base 26A and the conductive body 27A formed of the metal thinplate disposed on the surface of the base 26A. Further, since at least apart of the base 26A of the GPS antenna 28A is disposed so as to overlapthe solar cell 80 in the planar view viewed from the +Z-axis direction,it becomes possible to house the constituents such as the solar cell 80and the GPS antenna 28A in the case 31 even in the wrist device 200A asthe small-sized portable electronic apparatus.

Further, by disposing the connection section 25A (the contact point) forelectrically connecting the GPS antenna 28A and the CPU 21 to each otherso as to overlap the solar cell 80 in the planar view viewed from the+Z-axis direction, it is possible to increase the degree of freedom ofthe arrangement layout of the GPS antenna 28A and the CPU 21, and at thesame time, achieve the compact arrangement. Further, it is possible toincrease the light receiving area of the solar cell 80 without affectingthe receiving sensitivity of the GPS antenna 28A, and thus, it ispossible to increase the production of electricity in the solar cell 80.

5. Modified Examples of Arrangement of Solar Cell and GPS Antenna

It should be noted that in the embodiments described above, thedescription is presented showing the configuration in which the solarcell 80 constituted by arranging the four panels shaped like a Japanesefan to form an annular shape is disposed on the outer edge side of thedisplay panel 60, and the GPS antenna 28 is disposed at the positionwhere at least a part of the GPS antenna 28 overlaps the solar cell 80in the planar view viewed from the +Z-axis direction, but thearrangement configuration of the solar cell 80 and the GPS antenna 28 isnot limited to this configuration. The arrangement and the configuration(the shape) of the solar cell 80 and the arrangement of the GPS antenna28 can be modified into, for example, configurations described in thefollowing modified examples. It should be noted that the arrangementconfiguration of the solar cell 80 and the GPS antenna 28 is not limitedto the modified examples, but can be modified into other configurations.Hereinafter, Modified Example 1 through Modified Example 4 of thearrangement of the solar cell 80 and the GPS antenna 28 willsequentially be described with reference to FIG. 11 through FIG. 14 . Itshould be noted that FIG. 11 through FIG. 14 are each a plan viewshowing a modified example of the arrangement of the solar cell and theGPS antenna, wherein FIG. 11 shows Modified Example 1, FIG. 12 showsModified Example 2, FIG. 13 shows Modified Example 3, and FIG. 14 showsModified Example 4.

Modified Example 1

Firstly, Modified Example 1 of the arrangement of the solar cell and theGPS antenna will be described with reference to FIG. 11 . As shown inFIG. 11 , a solar cell 801 according to Modified Example 1 is locatedbetween the windshield plate 55 and the display panel 60 (see FIG. 4 ),and is disposed so as to be divided into four panels at positions havingan angle of roughly 45 degrees with respect to the X axis and the Yaxis, and is arranged so that light receiving surfaces 80 i, 80 j, 80 k,and 80 m of the respective panels face to the +Z-axis direction. Thesolar cell 801 has an outer circumference 801 os along the innercircumference of the opening section 31 s of the case 31, and an innercircumference 801 is shorter in circumferential length than the outercircumference 801 os, and is disposed in the outer peripheral part ofthe display panel 60. Specifically, in each of the panels respectivelyhaving the light receiving surfaces 80 i, 80 j, 80 k, and 80 m, there isprovided the inner circumference shorter in circumferential length thanthe outer circumference. The solar cell 801 is configured to have athrough hole having a rectangular shape (a roughly square shape in thepresent example) in the central part due to the panels respectivelyprovided with the light receiving surfaces 80 i, 80 j, 80 k, and 80 m.Specifically, in the solar cell 801, the outer circumference side ofeach of the panels has a circular arc shape, and the center side thereofhas a roughly linear shape, and thus, a display section 501 having arectangular shape is configured. It should be noted that although in thepresent configuration, there is illustrated the solar cell 801 using thefour panels, it is also possible for the solar cell 801 to be formed ofan integrated panel not divided.

Here, similarly to the first embodiment, the GPS antenna 28 includes thebase 26 formed of, for example, a resin member as the nonconductivemember, and the conductive body 27 disposed on the surface located onthe windshield plate 55 side of the base 26. The base 26 is disposed soas to curve along the inner circumference of the opening section 31 s ofthe case 31 in the 12-o'clock direction (the +Y-axis direction), and isdisposed so as to overlap the solar cell 801 (the light receivingsurface 80 i) in a planar view viewed from the normal direction (the+Z-axis direction) of the light receiving surfaces 80 i, 80 j, 80 k and80 m of the solar cell 801. In other words, the GPS antenna 28 isdisposed on the outer side (on the outer circumference side of the case31) of the contour of the display section 501, in other words, the innercircumference 801 is of the solar cell 801 in the planar view viewedfrom the +Z-axis direction. By disposing the GPS antenna 28 on the outercircumference side of the case 31 as described above, it is possible toincrease the freedom of the arrangement layout of the display section501, the solar cell 801, and so on, and thus, it is possible to moreeffectively arrange the display section 501, the solar cell 801, and soon.

The photoelectric sensor section 40 includes at least the sensorsubstrate 43 to which the light emitting sections 42 and the lightreceiving section 41 are connected, and is located in the central partof the through hole having the rectangular shape (the roughly squareshape in the present example) of the solar cell 801 in the planar viewviewed from the +Z-axis direction. In other words, the photoelectricsensor section 40 is disposed inside the solar cell 801 so as not tooverlap the solar cell 801 in the planar view viewed from the +Z-axisdirection, and so as to be surrounded by the solar cell 801. It shouldbe noted that the configuration of the photoelectric sensor section 40is substantially the same as in the first embodiment, and therefore, thedescription thereof will be omitted here.

According to the arrangement of the solar cell 801 and the GPS antenna28 related to Modified Example 1, it is possible to increase the degreeof freedom of the arrangement layout of the solar cell 801 and the GPSantenna 28, and at the same time increase the light receiving area ofthe solar cell 801 without affecting the receiving sensitivity of theGPS antenna 28, and thus, it is possible to increase the production ofelectricity in the solar cell 801.

Modified Example 2

Then, Modified Example 2 of the arrangement of the solar cell and theGPS antenna will be described with reference to FIG. 12 . As shown inFIG. 12 , a solar cell 802 according to Modified Example 2 is locatedbetween the windshield plate 55 and the display panel 60 (see FIG. 4 ),and is formed of two panels each having a circular arc shaped outer edgeon the outer circumference side, and a roughly linear straight part onthe center side, and is disposed so that the roughly linear straightparts are disposed along the X axis and opposed to each other to form adisplay section 502 between the two panels. Specifically, the solar cell802 has an outer circumference 802 os along the inner circumference ofthe opening section 31 s of the case 31, and an inner circumference 802is shorter in circumferential length than the outer circumference 802os, and is disposed in the outer peripheral part of the display panel60. Specifically, in each of the panels respectively having the lightreceiving surfaces 80 n, 80 p, there is provided the inner circumferenceshorter in circumferential length than the outer circumference. Itshould be noted that the light receiving surfaces 80 n, 80 p of therespective panels constituting the solar cell 802 are disposed so as toface to the +Z-axis direction.

Similarly to the first embodiment, the GPS antenna 28 includes the base26 formed of a resin member as the nonconductive member, and theconductive body 27 disposed on the surface located on the windshieldplate 55 side of the base 26. The base 26 is disposed so as to curvealong the inner circumference of the opening section 31 s of the case 31in the 12-o'clock direction (the +Y-axis direction), and is disposed soas to overlap the solar cell 802 (the light receiving surface 80 n) inthe planar view viewed from the normal direction (the +Z-axis direction)of the light receiving surfaces 80 n, 80 p of the solar cell 802. Inother words, the GPS antenna 28 is disposed on the outer side (on theouter circumference side of the case 31) of the contour of the displaysection 502, in other words, the inner circumference 802 is of the solarcell 802 in the planar view viewed from the +Z-axis direction. Bydisposing the GPS antenna 28 on the outer circumference side of the case31 as described above, it is possible to increase the freedom of thearrangement layout of the display section 502, the solar cell 802, andso on, and thus, it is possible to more effectively arrange the displaysection 502, the solar cell 802, and so on.

The photoelectric sensor section 40 includes at least the sensorsubstrate 43 to which the light emitting sections 42 and the lightreceiving section 41 are connected, and is located in the displaysection 502 disposed in the central part of the solar cell 802 in theplanar view viewed from the +Z-axis direction. In other words, thephotoelectric sensor section 40 is disposed at the position where thephotoelectric sensor section 40 does not overlap the solar cell 802 inthe planar view viewed from the +Z-axis direction. It should be notedthat the configuration of the photoelectric sensor section 40 issubstantially the same as described above, and therefore, thedescription thereof will be omitted here.

According to the arrangement of the solar cell 802 and the GPS antenna28 related to Modified Example 2, it is possible to increase the degreeof freedom of the arrangement layout of the solar cell 802 and the GPSantenna 28, and at the same time increase the light receiving area ofthe solar cell 802 without affecting the receiving sensitivity of theGPS antenna 28, and thus, it is possible to increase the production ofelectricity in the solar cell 802.

Modified Example 3

Then, Modified Example 3 of the arrangement of the solar cell and theGPS antenna will be described with reference to FIG. 13 . The solar cell803 according to Modified Example 3 shown in FIG. 13 is located betweenthe windshield plate 55 and the display panel 60 (see FIG. 4 ), and isformed of a semicircular single panel located on the outer edge side ofthe display panel 60, and having a circular arc shaped outer edge on theouter circumference side, and a roughly linear outer edge parallel tothe Y axis on the center side. Specifically, the solar cell 803 has anouter circumference 803 os along the inner circumference of the openingsection 31 s of the case 31, and an inner circumference 803 is shorterin circumferential length than the outer circumference 803 os, and isdisposed in either area of the outer peripheral part of the displaypanel 60. It should be noted that the solar cell 803 is disposed on the+X-axis side (3-o'clock side) of the case 31. Therefore, the displaysection 503 is disposed on the −X-axis side (9-o'clock side) of the case31. Further, the light receiving surface 80 s of the panel constitutingthe solar cell 803 is disposed so as to face to the +Z-axis direction.

Here, similarly to the first embodiment, the GPS antenna 28 includes thebase 26 formed of a resin member as the nonconductive member, and theconductive body 27 disposed on the surface located on the windshieldplate 55 side of the base 26. The base 26 is disposed so as to curvealong the inner circumference of the opening section 31 s of the case 31in the 12-o'clock direction (the +Y-axis direction), and is disposed soas to overlap the solar cell 803 (the light receiving surface 80 s) inthe planar view viewed from the normal direction (the +Z-axis direction)of the light receiving surface 80 s of the solar cell 803. In otherwords, the GPS antenna 28 is disposed on the outer side (on the outercircumference side of the case 31) of the contour of the display section503, in other words, the inner circumference 803 is of the solar cell803 in the planar view viewed from the +Z-axis direction. By disposingthe GPS antenna 28 on the outer circumference side of the case 31 asdescribed above, it is possible to increase the freedom of thearrangement layout of the display section 503, the solar cell 803, andso on, and thus, it is possible to more effectively arrange the displaysection 503, the solar cell 803, and so on.

Here, the photoelectric sensor section 403 includes at least the sensorsubstrate 43 to which the light emitting sections 42 and the lightreceiving section 41 are connected, and is disposed within the displaysection 503 in the planar view viewed from the +Z-axis direction. Inother words, the photoelectric sensor section 403 is disposed at theposition where the photoelectric sensor section 403 does not overlap thesolar cell 803 in the planar view viewed from the +Z-axis direction. Itshould be noted that the configuration of the photoelectric sensorsection 403 is substantially the same as described above, and therefore,the description thereof will be omitted here.

According to the arrangement of the solar cell 803 and the GPS antenna28 related to Modified Example 3, it is possible to increase the degreeof freedom of the arrangement layout of the solar cell 803 and the GPSantenna 28, and at the same time increase the light receiving area ofthe solar cell 803 without affecting the receiving sensitivity of theGPS antenna 28, and thus, it is possible to increase the production ofelectricity in the solar cell 803.

It should be noted that according to the arrangement in Modified Example3, when mounting the wrist device 200 on the wrist of the user, the+X-axis side (the 3-o'clock side) of the case 31 is located on thefingertip side of the user in many cases, and is located at the positionhard to be covered with clothing (a sleeve) of the user. Therefore, bydisposing the solar cell 803 on the +X-axis side (the 3-o'clock side) ofthe case 31 as in Modified Example 3, it is possible to increase theprobability that the sunlight can be received, and thus, it is possibleto perform more efficient electric power generation.

Modified Example 4

Then, Modified Example 4 of the arrangement of the solar cell and theGPS antenna will be described with reference to FIG. 14 . The solar cell804 according to Modified Example 4 shown in FIG. 14 is located betweenthe windshield plate 55 and the display panel 60 (see FIG. 4 ), and isformed of a semicircular single panel located on the outer edge side ofthe display panel 60, and having a circular arc shaped outer edge (theouter circumference) on the outer circumference side, and a roughlylinear outer edge (the inner circumference) parallel to the X axis onthe center side. Specifically, the solar cell 804 has an outercircumference 804 os along the inner circumference of the openingsection 31 s of the case 31, and an inner circumference 804 is shorterin circumferential length than the outer circumference 804 os, and isdisposed in either area of the outer peripheral part of the displaypanel 60. It should be noted that the solar cell 804 is disposed on the+Y-axis side (12-o'clock side) of the case 31. Therefore, the displaysection 504 is disposed on the −Y-axis side (6-o'clock side) of the case31. Further, the light receiving surface 80 u of the panel constitutingthe solar cell 804 is disposed so as to face to the +Z-axis direction.

Here, similarly to the first embodiment, the GPS antenna 28 includes thebase 26 formed of a resin member as the nonconductive member, and theconductive body 27 disposed on the surface located on the windshieldplate 55 side of the base 26. The base 26 is disposed so as to curvealong the inner circumference of the opening section 31 s of the case 31in the 12-o'clock direction (the +Y-axis direction), and is disposed soas to overlap the solar cell 804 (the light receiving surface 80 u) inthe planar view viewed from the normal direction (the +Z-axis direction)of the light receiving surface 80 u of the solar cell 804. In otherwords, the GPS antenna 28 is disposed on the outer side (on the outercircumference side of the case 31) of the contour of the display section504, in other words, the inner circumference 804 is of the solar cell804 in the planar view viewed from the +Z-axis direction. By disposingthe GPS antenna 28 on the outer circumference side of the case 31 asdescribed above, it is possible to increase the freedom of thearrangement layout of the display section 504, the solar cell 804, andso on, and thus, it is possible to more effectively arrange the displaysection 504, the solar cell 804, and so on.

Here, the photoelectric sensor section 404 includes at least the sensorsubstrate 43 to which the light emitting sections 42 and the lightreceiving section 41 are connected, and is disposed within the displaysection 504 in the planar view viewed from the +Z-axis direction. Inother words, the photoelectric sensor section 404 is disposed at theposition where the photoelectric sensor section 404 does not overlap thesolar cell 804 in the planar view viewed from the +Z-axis direction. Itshould be noted that the configuration of the photoelectric sensorsection 404 is substantially the same as described above, and therefore,the description thereof will be omitted here.

According to the arrangement of the solar cell 804 and the GPS antenna28 related to Modified Example 4, it is possible to increase the degreeof freedom of the arrangement layout of the solar cell 804 and the GPSantenna 28, and at the same time increase the light receiving area ofthe solar cell 804 without affecting the receiving sensitivity of theGPS antenna 28, and thus, it is possible to increase the production ofelectricity in the solar cell 804.

It should be noted that the description is presented citing the GPSusing the GPS satellites 8 as the location information satellitesprovided to the Global Navigation Satellite System (GNSS) as an exampleof the positioning system using the location information satellites inthe embodiments described above, but the GPS cited above is illustrativeonly. It is sufficient for the Global Navigation Satellite System to beprovided with the location information satellites for transmitting thesatellite signal of other systems such as Galileo (EU), GLONASS(Russia), or BeiDou (China), or the stationary satellites or thequasi-zenith satellites such as SBAS. In other words, it is alsopossible for the wrist device 200 to have a configuration for obtainingeither one of the date information, the time information, the locationinformation, and the speed information figured out by processing theradio waves (the wireless signals) from the location informationsatellites including a satellite other than the GPS satellites 8. Itshould be noted that Global Navigation Satellite System can be aRegional Navigation Satellite System (RNSS).

What is claimed is:
 1. A portable electronic apparatus comprising: acase having an opening on a first side of the case and a measurementwindow on a second side of the case opposite of the first side; atransparent cover disposed at the measurement window; and a windshielddisposed at the opening and configured to protect a plurality of innerstructures of the portable electronic apparatus, the plurality of innerstructures including: a solar cell disposed on an inner surface of thewindshield, a photoelectric sensor disposed at the positioncorresponding to the measurement window and obtaining a biologicalinformation; a display panel displaying the biological information; anda circuit board electrically connected to the display panel and thesolar cell, the circuit board being located so as to shade thephotoelectric sensor from light entering the case from the first side ofthe case.
 2. The portable electronic apparatus according to claim 1,further comprising: a secondary cell disposed among the circuit boardand the photoelectric sensor, the secondary cell being electricallyconnected to the solar cell in a cross-sectional view from a directionperpendicular to the normal direction.
 3. The portable electronicapparatus according to claim 1, wherein: the photoelectric sensorincludes a light emitter, a light receiver, and a sensor substratesupporting the light emitter and the light receiver, and the lightemitter and the light receiver are arranged between the measurementwindow and the sensor substrate.
 4. The portable electronic apparatusaccording to claim 2, wherein: the photoelectric sensor includes a lightemitter, a light receiver, and a sensor substrate supporting the lightemitter and the light receiver, and the light emitter and the lightreceiver are arranged between the measurement window and the sensorsubstrate.
 5. The portable electronic apparatus according to claim 2,wherein: the photoelectric sensor includes a light emitter, a lightreceiver, and a sensor substrate supporting the light emitter and thelight receiver, and the secondary battery is arranged between thecircuit board and the sensor substrate.
 6. The portable electronicapparatus according to claim 1, further comprising: an antenna disposedin the case and including a conductive body disposed on a surface of anonconductive member, the antenna overlapping the solar cell in the planview, and the antenna being configured to receive a positioningsatellite signal.
 7. The portable electronic apparatus according toclaim 6, further comprising: a processor supported by the circuit board;and a connection section supported by the circuit board and electricallyconnecting the antenna to the processor, the connection sectionoverlapping the solar cell in the planar view.
 8. The portableelectronic apparatus according to claim 6, wherein the conductive bodyof the antenna is disposed between the solar cell and the circuit boardin a cross-sectional view viewed from a direction perpendicular to thenormal direction of the light receiving surface.
 9. The portableelectronic apparatus according to claim 6, wherein at least a part ofthe nonconductive member overlaps the solar cell in the planar view. 10.The portable electronic apparatus according to claim 7, wherein theconnection section is a contact point electrically connecting theconductive body to the processor.
 11. The portable electronic apparatusaccording to claim 1, wherein the display panel including an end partdisposed so as to be covered with the solar cell in the planar view.